Oil filter unit



Jam 17, l950 K. E R. sTovALl. 2,495,031

OII.. FILTER UNIT Filed Oct. 16, `1947 UW A :Simentor KENNETH LEROY STOVALL WMM (Ittorneg Patented Jan. 17, 1950 ifo .gx

being such fas L'to ifa'cilitate expeditiouskremoval 'and 'replacement olfthe 5screens Whenever fthe ,"necessity *therefor i"arises, /feaeh filtering i screen being in the "form =ef -asimple i structure L,whichtls inexpensive-and economiealitff manufacture.

Other obj ects anddadvantagesiothe'invention "will appear -more fully-ihereina'fter, lit *being iun- :derstoo'dthatsaidiinventionfconsistssubstartilly yin the conibination,4 construction-location fand `relative*arrangement*cf'p arts; a-llfas describe detail heTeintETfaS Shownintheaccompanying "drawings-'andas lina'llypointcdfoutiin the ape pended claims.

Inthe accompanyingdrawings which-illustrate a preferred constructionof'oilifilter apparatus embodying V.the 4principles .of the present invention.

lFigurellliis agperspectiveview infime-.apparatus showing the lid of one of thersfilterflunitsseparated therefrom;

Figure 2 is a transverse view of the apparatu as taken on the line 2-2=offFigure l; I

Figure iis -a Aview corresponding to *the-@lower jportioni of "figureQ-sI-wwing' lthecontro`lvalve in its alternative rposition;

Figure f4 isdaJ view-partially' in section-'showing the control Valve mechanism for the apyf paratus .f2 :generallyconsistszofza :pair of filter `unitsl'IIl-"t commonly fmountediupon a isuitablezzbase r-II, Vthe units Ill-.I beingrinthe'formiofvrectangular casfings =I'2-I'21disposed in laterallyspaced,;substan ltial parallel relation. '.Eachfof :the .casings [i2- [2 is substantially closedwupon-'alllbut thetopssides lthereof; the openatop of-,eachccasingbeingnor- -mallyclosed' by afremovableirlosure lid -.'I 3 Awhich 'lis fadapted fito zbe rmlyxipressed pinto V,closedposition, as l shown'iinlfi'gure2,2byI means lfof fa vlongirtudinally extendingxclosureabar If'having :oppofsitely presenting notches .I5-:I5 respectively fforirned adjacentmppositerendsofthezbar. .These "notches il 5--I 5 lLrespef'ctiv'e'ly embrace thezshanks I6-l6 of lugs I'I-I'I suitably secured to Aopposite ends of' each :casing |12, :each lug `:being Vprovided with anf enlarged `rhea'd :I8 .adapted vvto foverlie the l'flipper surfacefo'ftlnebar M vItolimit ivertieal Ydisplacement of thel'atter. "The barM is tted with ia -pairof r:screw felementslIS-LI'S whichare manually Voperable YEfor 1axial -.adjustment toward and #away 'from Tthe 4uppelwsurfacefof fthe closure 'lid "f3- when thelatteris Adisposed between its casing 1I? -andlthebarll altlwill be apparentthat upon axially adjusting the screw elements IIS-I 9 ltois exerted fagainstathe Vlid vI3 to seat vit 4firmly againstitheftopfof itsassociated casing I2 :and so A:seal 'fthef'latter `'againstescape of oil therefrom Vvlilach casing I2-o'f the apparatus is internally y'lprovidedfwith apluralityzof longitudinally spaced rpairsff verticallylexten'ding channel `members -2Il isuitablysecuredtoithe'innersurfaces of the casing'side walls. Each pair of thesevchannel mem- ""bers`f20 form-afgideway lfor accommodating "ftherebetween a fremovable Vfilter element 2 I most-'clearlyappears-in Figures andl, eachl- -ter'elernent 2l fcomprises va cuadrangular frame f f22 formed of suitably l"rigid material, such las -metal',the frame opening beingdittedrwith amore Figure 5 is a perspective of one of the filter I screen elements; and

Figure 6 is a perspective View in enlarged scale showing the mounting of the filter screen element in the lter unit as viewed along the line 6 6 of Figure l.

Referring now to the drawings, and more particularly to Figure 1 thereof, it will be observed that the filter apparatus of the present invention for-less tautly stretched filter 'fabric 23 of any de- --s'ired material'ssultable'forithe purpose, such as Acotton tmesh. Itewill fbe 'apparent that `tlne filter elements 2I=are-each readilyiinsertable into and removable from their channel guides 20-20 fixed in the casings I2-I2 and that when said elements are mounted in a casing with the closure lid thereof tightly sealed thereon they provide a series of longitudinally spaced, substantially parallel screens for filtering the oil as it passes therethrough.

In order to provide for alternative use of the lter units I0-I0, valve-controlled conduits are the injection pump of an oil engine. cessive pressure that may be developed in the Operatively associated with the oil inlet con-' duit is a two-way valve member 29 suitably jour:

nalled in a sleeve 30 tted in the base Il, said sleeve having ports 3I-32 respectivelyV in com'-`V munication with the inletjpassages 25 rand 26.

The valve member 29 is formed with angularly'- related passages 33--34l commonly in communi-.1 l

cation with an axial passage 35 leading to the oil inlet conduit 36,v the passages 33-34 being Vadapted for selective registry, respectively, with the ports 3l-32 of the valve sleeve 3D.

In similar manner, a. .two-Way valve member 29a is operatively associated: with the oil outlet conduit, said valve member being rotatably mounted inV a sleevea ttedin the rear end of the base Il. This sleeve 3lla is provided with -ports respectively vin .communication with the --outlet passages fromthe casings l2|2. As in the case of the valve member29, the valve member 29H is also formed with angularly related passages commonly Vin communication with an axial passage 35a leading tothe oil discharge conduit31. t l W As most clearly appears'in Figure 4,.,the valves 29 and 29a are interconnectedfor simultaneous operation by a shaft 38 extending therebetween,

the inlet valve29 'being fitted with an operating handle 39. In operation of the apparatus,

Athis handle 39 is initially thrown into one or the other of its two extreme positions as shown in Figures 2 and 3,Y thereby placingv in operation one or the other of the filter units Ill-I0. Thus, when the handle 39 is shifted into the position shown in Figure 2, only the'right hand filter unit is operative for the passage lof oilitherethrough, the valves 29 and 29a :being closed against passage of oil into and through the lefthand unit. Conversely', when the handle 39 is shifted into the position showninFigure 3, only the left hand unit is operative for the passage of oil therethrough. vIn normal, operation of the apparatus, the oil to be filtered entersthat one of the units which is in operation,ji s .therein filtered as itpasses through the-filter elements 2| thereof, and in filtered state is then discharged from the filter unit for use asdesired,v as for instance, in

Any exoil vlter during passage ofjoil therethrough may be relieved by way' of'a relief valve 40 suitably fitted in the closure lid I3; vThe sediment contained in the oil-and which is lfiltered therefrom solely by the lter screens gradually accumu- 65 lates in the bottom of the filter casing.

4 When it becomes necessary to clean a filter unit of the apparatus of the accumulated debris and sediment contained in the oil passed therethrough, the valve 29 is operated to throw 5 into operation the other filter unit, following Which the closure lid I3 of the unit to be cleaned is lifted to permit removal of all of the filter elements from the unit for such cleaning and servicing thereof as may be necessary. 'Ihe sludge l0 'accumulated in the bottom of the casing is then flushed out by way of the'vr discharge fitting 4l provvided in the bottom of the casing, whereupon when the screens are replaced and the closure lid is reseated in sealed position the unit is again ready for operation. It will be understood, of course, that the presentinvention is susceptible of various changes and modifications which may be made from time to time without departing from the general principles or real spirit thereof, and it is accordingly intended to'. claim the same broadly, as Well as specifically, as indicated inthe appended claim. rWhat is claimed as new and useful is:

, In a filterapparatus of the character described, a pair of lterxunits respectively in the form of identical rectangular casings disposed in laterally spaced, yparallel relation, a common base for supporting said casings, al plurality of interchangeable andreplaceableY filter elements disposed nlongitudinally spaced, parallel relation Within the interiorY of eachcasing and extendning transversely across the direction of flow of ay liquid therethrough, 'means for removably supporting said filter elements within each casing, a vtopclosure, member adapted to be removably secured to each casing to close the same .andvlockgsaid filter elementrsoperatively within said casing, eachrof,A said casings being provid- `ed at opposite ends thereof with fluid inlet and 40 outlet openings respectively inv communication v with passages formed in said common base for said casings, valve means located at each end of said lter apparatus for opening the uid inlet vand outletpassages of one casing while simul- -15 taneously closing those of the other, and means for synchronously actuating said valve means including a shaft extending longitudinally through l Vsaid base frompne valve means to the other Yand an operating handle accessible at one end v of the apparatus for rotating said shaft to render operative at any one time only one of said filter units. Y i i, f KENNETH ROY STOVALL.

REFERENCES CITED YThe following references `are of record in the file of this-patent;

Y, Y UNITED s'iiArrEs PATENTS Number v i :Name n Date 1,842,990 Lentz Jan. 26, 1932 1,910,747 Burhams May 23, 1933 2,144,444 Vctor Jan. 17, 1939 2,333,609

Widman Nov. 2, 1943 

